Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WJ3MK callsign genealogy
Currently held by KEISER SR, WILLIAM J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by WJ3MK's current licensee, walking backwards.
- KEISER SR, WILLIAM JPAgranted 2006-05-19cancelled 2009-03-24
Successor callsigns
Callsigns held now by people who previously held WJ3MK.
No current licensee on record previously held this callsign.